Viby was first mentioned in 1331. The current castle was built by Charles IX of Sweden to his wife Kristina between 1622-1626. The Dutch Renaissance style castle was designed by Casper van Panten. After the Crown donated Vibyholm to Gustaf Gustafsson af Vasaborg it has been owned by several families. The castle was left to decay in the early 1700s, but restored by Gustaf Ulf Claesson Bonde af Säfstaholm in the 1730s. The next restorations were made in the early 1800s and between 1852-1854. Today Vibyholm is privately owned and not open to the public.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.